# HOME AUTOMATION - RASPBERRY PI PICO W
# Light ON only when button is pressed
# Fan controlled by temperature (DHT22)

import time
from machine import Pin
import dht

# ---------------- PIN CONFIGURATION -----------------
LIGHT_PIN = 15      # LED (Light)
FAN_PIN = 14        # LED (Fan)
BUTTON_PIN = 16     # Push Button
DHT_PIN = 13        # DHT22 Data

# ---------------- INITIALIZATION --------------------
light = Pin(LIGHT_PIN, Pin.OUT)
fan = Pin(FAN_PIN, Pin.OUT)
button = Pin(BUTTON_PIN, Pin.IN, Pin.PULL_DOWN)
sensor = dht.DHT22(Pin(DHT_PIN))

# Initial states
light.value(0)
fan.value(0)

print("Home Automation System Started")

# ---------------- MAIN LOOP ----------------
while True:
    try:
        # ---------- BUTTON CONTROLS LIGHT ----------
        if button.value() == 1:
            light.value(1)   # Button pressed → Light ON
            print("Button Pressed → Light ON")
        else:
            light.value(0)   # Button released → Light OFF

        # ---------- DHT22 CONTROLS FAN ----------
        sensor.measure()
        temperature = sensor.temperature()
        humidity = sensor.humidity()

        print("Temperature:", temperature, "°C")
        print("Humidity:", humidity, "%")

        if temperature > 30:
            fan.value(1)
            print("Fan ON (High Temperature)")
        else:
            fan.value(0)
            print("Fan OFF")

        print("--------------------------------")
        time.sleep(1)

    except Exception as e:
        print("Sensor Error:", e)
        time.sleep(2)